package dto

import (
	"time"

	"photography-backend/internal/model/entity"
)

// CreateAlbumRequest 创建相册请求
type CreateAlbumRequest struct {
	Title       string `json:"title" binding:"required,min=1,max=200" validate:"required,min=1,max=200"`
	Description string `json:"description" binding:"omitempty,max=1000" validate:"omitempty,max=1000"`
	Slug        string `json:"slug" binding:"omitempty,min=1,max=255" validate:"omitempty,min=1,max=255"`
	CategoryID  *uint  `json:"category_id" binding:"omitempty,min=1" validate:"omitempty,min=1"`
	IsPublic    bool   `json:"is_public" binding:"omitempty"`
	IsFeatured  bool   `json:"is_featured" binding:"omitempty"`
	Password    string `json:"password" binding:"omitempty,min=6" validate:"omitempty,min=6"`
}

// UpdateAlbumRequest 更新相册请求
type UpdateAlbumRequest struct {
	Title        *string `json:"title" binding:"omitempty,min=1,max=200" validate:"omitempty,min=1,max=200"`
	Description  *string `json:"description" binding:"omitempty,max=1000" validate:"omitempty,max=1000"`
	Slug         *string `json:"slug" binding:"omitempty,min=1,max=255" validate:"omitempty,min=1,max=255"`
	CoverPhotoID *uint   `json:"cover_photo_id" binding:"omitempty,min=0" validate:"omitempty,min=0"`
	CategoryID   *uint   `json:"category_id" binding:"omitempty,min=0" validate:"omitempty,min=0"`
	IsPublic     *bool   `json:"is_public" binding:"omitempty"`
	IsFeatured   *bool   `json:"is_featured" binding:"omitempty"`
	Password     *string `json:"password" binding:"omitempty,min=0" validate:"omitempty,min=0"` // 空字符串表示移除密码
	SortOrder    *int    `json:"sort_order" binding:"omitempty,min=0" validate:"omitempty,min=0"`
}

// AlbumResponse 相册响应
type AlbumResponse struct {
	ID           uint               `json:"id"`
	Title        string             `json:"title"`
	Description  string             `json:"description"`
	Slug         string             `json:"slug"`
	CoverPhotoID *uint              `json:"cover_photo_id"`
	UserID       uint               `json:"user_id"`
	CategoryID   *uint              `json:"category_id"`
	IsPublic     bool               `json:"is_public"`
	IsFeatured   bool               `json:"is_featured"`
	HasPassword  bool               `json:"has_password"`
	ViewCount    int                `json:"view_count"`
	LikeCount    int                `json:"like_count"`
	PhotoCount   int                `json:"photo_count"`
	SortOrder    int                `json:"sort_order"`
	User         *UserResponse      `json:"user,omitempty"`
	Category     *CategoryResponse  `json:"category,omitempty"`
	CoverPhoto   *PhotoListItem     `json:"cover_photo,omitempty"`
	RecentPhotos []PhotoListItem    `json:"recent_photos,omitempty"`
	CreatedAt    time.Time          `json:"created_at"`
	UpdatedAt    time.Time          `json:"updated_at"`
}

// AlbumListItem 相册列表项（简化版）
type AlbumListItem struct {
	ID           uint           `json:"id"`
	Title        string         `json:"title"`
	Slug         string         `json:"slug"`
	IsPublic     bool           `json:"is_public"`
	IsFeatured   bool           `json:"is_featured"`
	HasPassword  bool           `json:"has_password"`
	ViewCount    int            `json:"view_count"`
	LikeCount    int            `json:"like_count"`
	PhotoCount   int            `json:"photo_count"`
	CoverPhoto   *PhotoListItem `json:"cover_photo,omitempty"`
	CreatedAt    time.Time      `json:"created_at"`
	UpdatedAt    time.Time      `json:"updated_at"`
}

// ListAlbumsOptions 相册列表查询选项
type ListAlbumsOptions struct {
	Page       int    `json:"page" form:"page" binding:"omitempty,min=1" validate:"omitempty,min=1"`
	Limit      int    `json:"limit" form:"limit" binding:"omitempty,min=1,max=100" validate:"omitempty,min=1,max=100"`
	Sort       string `json:"sort" form:"sort" binding:"omitempty,oneof=id title created_at updated_at view_count like_count photo_count" validate:"omitempty,oneof=id title created_at updated_at view_count like_count photo_count"`
	Order      string `json:"order" form:"order" binding:"omitempty,oneof=asc desc" validate:"omitempty,oneof=asc desc"`
	UserID     *uint  `json:"user_id" form:"user_id" binding:"omitempty,min=1" validate:"omitempty,min=1"`
	CategoryID *uint  `json:"category_id" form:"category_id" binding:"omitempty,min=1" validate:"omitempty,min=1"`
	IsPublic   *bool  `json:"is_public" form:"is_public" binding:"omitempty"`
	IsFeatured *bool  `json:"is_featured" form:"is_featured" binding:"omitempty"`
	Search     string `json:"search" form:"search" binding:"omitempty,max=100" validate:"omitempty,max=100"`
}

// AlbumListResponse 相册列表响应
type AlbumListResponse struct {
	Albums []AlbumListItem `json:"albums"`
	Total  int64           `json:"total"`
	Page   int             `json:"page"`
	Limit  int             `json:"limit"`
}

// AddPhotosToAlbumRequest 向相册添加照片请求
type AddPhotosToAlbumRequest struct {
	PhotoIDs []uint `json:"photo_ids" binding:"required,min=1" validate:"required,min=1"`
}

// RemovePhotosFromAlbumRequest 从相册移除照片请求
type RemovePhotosFromAlbumRequest struct {
	PhotoIDs []uint `json:"photo_ids" binding:"required,min=1" validate:"required,min=1"`
}

// AlbumPasswordRequest 相册密码验证请求
type AlbumPasswordRequest struct {
	Password string `json:"password" binding:"required" validate:"required"`
}

// AlbumStatsResponse 相册统计响应
type AlbumStatsResponse struct {
	Total          int64                `json:"total"`
	Published      int64                `json:"published"`
	Private        int64                `json:"private"`
	Featured       int64                `json:"featured"`
	WithPassword   int64                `json:"with_password"`
	TotalViews     int64                `json:"total_views"`
	TotalLikes     int64                `json:"total_likes"`
	TotalPhotos    int64                `json:"total_photos"`
	CategoryCounts map[string]int64     `json:"category_counts"`
	Recent         []AlbumListItem      `json:"recent"`
	Popular        []AlbumListItem      `json:"popular"`
}

// ConvertToAlbumResponse 将相册实体转换为响应DTO
func ConvertToAlbumResponse(album *entity.Album) *AlbumResponse {
	if album == nil {
		return nil
	}

	response := &AlbumResponse{
		ID:           album.ID,
		Title:        album.Title,
		Description:  album.Description,
		Slug:         album.Slug,
		CoverPhotoID: album.CoverPhotoID,
		UserID:       album.UserID,
		CategoryID:   album.CategoryID,
		IsPublic:     album.IsPublic,
		IsFeatured:   album.IsFeatured,
		HasPassword:  album.HasPassword(),
		ViewCount:    album.ViewCount,
		LikeCount:    album.LikeCount,
		PhotoCount:   album.PhotoCount,
		SortOrder:    album.SortOrder,
		CreatedAt:    album.CreatedAt,
		UpdatedAt:    album.UpdatedAt,
	}

	// 转换关联对象
	if album.User.ID != 0 {
		response.User = ConvertToUserResponse(&album.User)
	}
	if album.Category != nil {
		response.Category = ConvertToCategoryResponse(album.Category)
	}
	if album.CoverPhoto != nil {
		coverPhoto := ConvertToPhotoListItem(album.CoverPhoto)
		response.CoverPhoto = &coverPhoto
	}

	// 转换最近照片
	if len(album.Photos) > 0 {
		recentPhotos := make([]PhotoListItem, 0, len(album.Photos))
		for _, photo := range album.Photos {
			recentPhotos = append(recentPhotos, ConvertToPhotoListItem(&photo))
		}
		response.RecentPhotos = recentPhotos
	}

	return response
}

// ConvertToAlbumListItem 将相册实体转换为列表项DTO
func ConvertToAlbumListItem(album *entity.Album) AlbumListItem {
	item := AlbumListItem{
		ID:          album.ID,
		Title:       album.Title,
		Slug:        album.Slug,
		IsPublic:    album.IsPublic,
		IsFeatured:  album.IsFeatured,
		HasPassword: album.HasPassword(),
		ViewCount:   album.ViewCount,
		LikeCount:   album.LikeCount,
		PhotoCount:  album.PhotoCount,
		CreatedAt:   album.CreatedAt,
		UpdatedAt:   album.UpdatedAt,
	}

	// 转换封面照片
	if album.CoverPhoto != nil {
		coverPhoto := ConvertToPhotoListItem(album.CoverPhoto)
		item.CoverPhoto = &coverPhoto
	}

	return item
}